LAST UPDATED: 2022-10-16
This report contains a list of accessible SMTP servers found by our daily IPv4 full Internet scans. This is just a population scan – there are no vulnerabilities being reported – but network owners should be aware of any unintentional SMTP server exposure and should verify all are patched to the latest software version.
This is just a population/external surface exposure scan. If you prefer not to receive it, contact us to opt-out.
For a report containing vulnerable email servers please check out our Vulnerable SMTP Report and Vulnerable Exchange Server Report.
You can track latest SMTP scan results on the Shadowserver Dashboard.
For more information on our scanning efforts, check out our Internet scanning summary page.
This report comes in 2 versions, IPv4 and IPv6.
Filenames: scan_smtp, scan6_smtp